Telegraphone.



No. 898,283. PATENTED' SEPT. 8, 1908. H. R. STUART; TELEGRAPHONE. APPLIOATION FILED SEPT. 24, 1907.

3 SHEETS-SHEET 1.

N0. 898,283. PATENTED SEPT. 8, 1908.

H. R. STUART:

TELEGRAPHONE. APPLICATION rum) 811M224, 1907.

BSHBETS-SHEET 2.

No. 898,283. PATENTED SEPT. 8, 1908.

H. R. STUART.

TELEGRAPHONE.

APPLICATION FILED SEPT. 24, 1907.

SSHEETS-SHEET 3.

.magnetically recordin HARVE R. STUART, OF WHEELING, WEST VIRGINIA.

TELEGRAPHONE.

' Specification of Letters Patent.

Patented Sept. 8, 1908.

Application filed September 24, 1907. Serial No. 394,292.

To all whom it may concern:

Be it known that I, HARVE R. STUART, a citizen of the United States, residing at Wheeling, in the county of Ohio and State of West Vir inia, have invented certain new and useful In rovements in Telegraphones, of which the fo owing is a full, clear, and exact description. I

-My invention relates to an instrument for and reproducing sound and known ast e telegraphone.

The invention is more particularly applicable to what is known as a disk machine in which a flat steel disk is continuously rotated in close proximity or contact with a recording and re roducing magnet mounted on a carriage w ich moves radially with respect to the disk, and traces a spiral magnetic path or record thereon.

The present invention pertains specially to the construction of said carriage, and. while described particularly in use with a disk machine is not limited thereto, being equally applicable to all the other types of machine in which amovable carriage is used. In machmes of the above character 1t.1s

always necessaryfor the recording and reproducing magnet to be maintainedin very close dproximity or actual'contact with the recor mg medium at all times. But since the recording medium must be frequentl removed and replaced, it is evident that it 1s ordmarily practically impossible to have such medium revolve or move in a-perfectly true unvary'ing path of revolution or movement. For example, in the disk machine where the disks are repeatedly being removed,

1 and changed, it is wholly impractical to have the mechanism so accurate and the adjustment so perfect that there will never be any sli ht lateral or wabbling movement.

in accordance with the present inventionthe disk or recording medium is mounted so i as to be quickly and expeditiously remov-' able, and no special attempt is made-to secure absolute accuracy in the movement ofrevolution. S eclal means are, however,

, provided. by w ich any slight movement of the disk out of its proper p ane of; rotation is compensated for bya corresponding movement of the magnet or magnets of the carria e, so that the latter keep in permanent an unvarying ,contact with the disk at all times. For this, purpose I employ a carriage having means for maintainin the operating .magnet or magnets pressed. ightly against the recording medium, and I so arrange this mechanism that it is wholly independent of the carriage feed and carriage returning functions.

The invention also includes certain additional features of the carriage mechanism by which the feed and return thereof are made in a very convenient, simple and eflicient manner.

In the drawing: Figure 1 is a top or plan view of a 'telegraphone embodying the principles of my invention; Fig. 2 is a vertical sectional view of the same; 3 is a detail top plan view showing the carriage mechanism; Fig. 4 is a section of art of the carriage mechanlsm; this section is taken on the line IVIV of Fig. 5; Fig. 5 is a section on the line VV of Fig. 4 and 6 is a perspective viewof part of the same.

. Referrin -to the drawings in which like parts are esignated by the same reference sign, 1 indicates a box or casing having a plate 2, which forms the base or sup all the operating parts.

clamping device 7. The spindle 5 is driven and controlled in its movement by any suitable means, such,- for example, as a spring motor 9, and governor B.

A practical construction of the means for diivin and controlling the recording medium orms the subject of a com anion application, Serial No. 396,845 file herew1t and these features need notthereforebe further considered in this case.

Upon the rigid frame or casting 3 I provide a round rigid rod 10, which constitutes the main guiding means for the carriage mechanism. This rod 10 is su ported in a direction parallel to the face of t e recording medium 6, by suitable journal bearings 11, which permit both a longitudinal movement of said 'rod and an angular movement on its axis.

At a suitablefippint along the length of this rod there is ed a frame 12 (see Fig. 6),

which .constitutes the main flame-of the carriage. This frame'being fixed to the rod 10, it is clear that it partakes of any longitudinal or angular movement thereof.-

13 denotes a counterweight formjn part of the carriage frame 12, so as to pro uce a force tending to tilt the carriage, together of the lead screw, the motion being per-.

with its rod 10, into a position with its lefthand portion upward in Fig. 6.

14 indicates a lead screw journaled in the rigid frame or casting 3 and rotated commensurately with the recording medium 6, by the intermeshing worm gears 8 and '16 on the spindle 5 and the said lead screw respectively. The carriage 12 has a portion 17 which is adapted to engage the lead screw 16 when tilted upward thereagainst by the counterweight 13. This ortion 17 is threaded to correspond to the lead. screw and constitutes a nut to feed the carriage in connection therewith. It will be evident that when the carriage 12is in this relationithat it will be fed longitudinally by the rotation mitted by the longitudinal sliding movement of the rod 10 in its journal bearings. The upwardly threaded part 17 is engaged against the lead screw, 1s permitted by the angular movement lars therefor.

function in limiting of the ro 10 in itsjournal bearings.

The carriage 12 has a central hollow portion 18, the material being entirely cut away soas to expose the-rod 10 therein. In this cut-away portion or'cavity there is journaled loosely on the rod 10, a sleeve 19, having a pair of laterally projectin arms 20. 21 1n- 7 icates a spring surroun ing the sleeve 19' and en a ug 22 thereon,

gaging and also the frame 12 so as to impart an angular movementtofsaid sleeve v1.9 with relation to the frame12. The sleeve 19 has a free angular moyement on the rod 10 under the influence of-its s ring 21, but is constrained against any in ependent longitudinal movement b the side members 12 of the frame 12, whic of the arms 20 under the tension of the spring 21. For this purpose the In 22 engages a protuberance 12" on the insi e of the counterweight 13, or other convenient point of the carriage frame.

Atthe upper ends of I cone or ivot bearings23, between which is .journale a small block 24, preferably of insulating material- 25 and 26 are magnets inset in this :block, and preferably. at equal distances toeach side of the pivotal axisof support thereof. The magnets 25 and26 are the-recording. and reproducing and the erasing ma ets of the telegraphone. v

- It is obvious that any equivalent supporting holding frame, lever, or other means may be employed for sufpgprting the telegraphone magnets mplace o e construction of block 24, as shown. I 1

may be manually moved either tilting movement under the influence-of the counterweight 15 bywhich the thearm s 20 -there are In addition to the above features of con struction, there is provided a de ending bail 27, whichdepends downwardly cm the rod 10 in looselyswinging relation therefrom, but constrained against independent longitudinal movement by the parts 12 of the frame which act as collars for this bail, in addition to their other functions. At the bottom of the bail there is a projecting studor studs 28, which are guided in a slot 29, in the casting 3,"parallel to the direction of movement of the carriage. Oneof these studs has certain functions incontrolling the speed of the recording medium, as fully set forth in my companion application above referred to.

' There is also'provided a handle or similar dewhich it ongitudiits supporting frame 1. follows: Assumin the vice 30, at the end of the rod 10, b

nally or angularly in The operation is as parts are in the relation" weight 13, which causes the threaded art or nut 17, to engage the lead screw. ntir 1y independently of this, the block 24, carrying the telegraphone magnets, is impelled upward bythe spring 21 acting on the sleeve 19. The upward movement spring tension is, however, limited by the lug 22' engaging the stop 12". If now a record disk be clamped upon the spindle in the relationshown' in Fig. 2, the magnets 25 and 26 will be engaged thereby and de ressed against the tension of spring 21.- 'T e tension of this sprin is, however, much lighter than the force 0 the counterweight 13,- so that the engagement of the nut 17 with the lead screwis not disturbed. 'If themachine is nowstarted, the carriage, together withv tinuous spiral ath on the lower surfaceof the disk, Bot magnets are borne against the disk with a certain degree of spring tension obtained from the spring 21, and this. tension is divided between the two magnets Y shown, wit no' record disk in the machine, it is evident that v the carriage frame 12 is tilted by its counterunder this in exact equality byreason of the equalizing lever construction by which they are mounted on the supporting arms 20. This construction not only'keeps the magnets main-.

tained againstthe disk with an exactly equal and predetermined pressure, but exactly compensates for an unequal or wabblm movement of the dis in its rotation. It wil be evident that the" range of u and down movement of the arms 20 is su cient to accom'modate thelargest lateral. or wabbling movement of the disk which ordinarily occurs, so that the spring 21 is always effectivev to perform its function in keeping the magnets against thedisk with unvarying .e ciency; As more or less, and sometimes, when carelessly inserted, to a very-considerable extent, this the disk almost always wabbles to any position desired where it is automatically rengaged upon the lead screw by the weight 15. It is evident that this repositioning of the carriage canbe done at any time in its movement whether or not it has arrived at the limit of its normal feed. Should the apparatus be allowed town after the carriage has arrived at the normal limit of its feeding movement, no harm is done, because the nut 17 merely passes on to-an unthreaded portion of the lead screw where it will not be further impelled longitudinally.

While I have shown a counterweight 13 and a spring21 in the above construction, it is evident that any desired tensioning means may be employed. The means for tensioning the nut 17 against the lead screw maybe as strong as required, while the tensioning means for the block 24 should be comparatively light. Byreason of the construction shown, it is evident that the tensioning means of the nut 17 against the lead screw is wholly independent ofand has no effect on the tensioning engagement between the telegraphone magnets and therecording medium, notwithstanding that these parts are made a part of the same carriage frame and mounted on the sam guiding and tiltingrod 24.

What I claim, is

1. In a telegraphone, a carriage longitudinally and angularly movable on a fixed axis, feeding means for said carriage, means for tilting said carriage on said axis whereby it 1s disengaged from its feeding means, and a telegraphone magnet yieldingly supported by said carriage.

2. In a telegraphone, a carriage longitudinally andangularly movable on afixed axis, feeding means for said'carriage, means for tilting said carriage on said axis whereby it is .disengagedfrom its feedingmeans, and a telegraphone ma et also angularly movable on sald axis an yieldingly supported from said carria e.

3. fn a telegraphone, a carriage longitudinally and angularly movable on a fixed axis, feeding means for said carriage, means for v tilting said carriage on said axis whereb it is disengaged from its feeding means, a evice pivoted onsaid axis and longitudinally movable with the carriage, and a part having a telegraphone magnet and an erasing magnetv and pivoted on'said device.

4. In a device of the class described, a con- -t1nuously rotating record medium, a lead screw rotating commensurately therewith, a carriage having a yieldingengagement with said screw, yieldin supporting means on said carriage, and a te egraphone magnet yieldingly carried by said means.

5. In a telegraphone, a continuously movable medium, a carriage movable arallel thereto and tiltable on its axis of longltudinal movement, yielding means on said carriage, and a block or frame having a plurality of devices cooperating with said medium, and

. yieldingly supported on said means.

6. In a telegraphone, a continuously movable medium, a lead screw, a carriage in yielding engagement with said lead screw, ielding means on said carriage, a blobk or raine pivoted on said means, and telegraphone magnets su ported by said block.

7. In a te egraphone, a continuously rotating disk having a smooth face, a carriage movable over said face, a block or frame yieldingly and tiltably supported on said carriage, and a pair of telegraphone magnets supported by said block and moving on said disk symmetrically with res ect to a single radial line of direction, where y they trace or track a single path on said disk.

8. In a telegra hone, a continuously movable medium, a iead screw connected to be rotated therewith, a carriage movable parallel to said medium and screw and having tilting means yieldingly pressed into engagement with said screw to. feed the carriage, a telegra hone magnet, and independent spring presse means pivoted on sald carriage for supporting said magnet.

Y 9. In a tele raphone, a continuously moving medium, devices engaging said medium,

means for. yieldingly supportlng said devices, and a carriage movable and tiltable on a fixed engagingsaid lead screw and yieldingly supporting said means.

11. In a telegraphone, a continuously movable medium, a carriage guided parallel thereto, an arm pivoted to said carriage, a telegra hone magnet on said arm, and a spring or impelling said arm away from said carriage.

12. In a telegraphone, a continuously movable medium, a parriage movable parallel thereto, feeding means for said carr1age, l"" means for tilting the carriage to disengagjif'lt} hane from its-feeding means, and a telegrap magnet supported by said carriage. I

13. In atelegraphone, a continuously; ovable medium, acarriage movable a, 'llel thereto, feeding means for said carriage, means for tilting the carriage to disengage it fromits feeding means, and a telegraphone raphone magnet yieldingly supported from said carriage.

15. In a telegraphonej a longitudinally and angularly movable rod, a carriage fixed thereto and having a threaded portion, a lead screw, means for yieldingly pressing said threaded'p'ortion against said lead screw, means for tilting said rod whereb the carriage is disengaged from the lea screw, a telegraphone ma net pivotally supported on said carriage, an a spring for impelling said magnet with respect to said carria e.

16. In a telegraphone, an anguIarly and longitudinall movable rod, a carriage fixed thereto and avin a central cut-awa ortion or cavity, a s eeve loosely journa e on said rod within said cavity, means for yieldingly impelling said sleeve with respect to said carriage, and a telegraphone magnet .riage and rod, a

screw, and a te supported by said sleeve.

17. In a telegraphone, an angularly and longitudinally movable rod, a carriage fixed thereto, a sleeve loose on said rod and fixed against longitudinal movement thereon by said carriage, arms projecting from said sleeve, and a telegraphone magnet carried by said arms.

18. In a telegraphone, a carriage, a sleeve pivoted with respect thereto and yieldingly impelled therefrom, arms projecting. from said sleeve, a block pivoted to said arms, and telegraphone magnets carried by said block on either side of said pivotal axis. I

19. In a tele raphone, a'lead screw, a carriage having a t readed portion engaging the same, means for yieldin ly pressing said threaded portioniagainst t e screw, a teleg-' raphone magnet movably supported with respect to said carriage, and resilient means for impelling said. magnet with respect to said carriage, the tension of said resilient means being independent of the force of said yieldin means.

20. n a telegraphone, a rod angularly. and longitudinally movable, a carriage wholly supported thereb lbad screw engaged by said carriage in its tilting movement, a telegraphone magnet movably supported with respect to said carriage, and resilient means forimpelling said magnet with respect to said carriage and acting wholl independentlyof the tilting movement of t e carriage against said lead screw.

21. In a telegraphone, a carriage, a lead egraphone magnet, and two means for tilting said carseparate yielding means entirely independent of one another and acting respectively to impel the carriage into enga ement with said screw and said magnet wit respect to the carriage. i,

22. In a telegra hone, a longitudinally and angularly mova le rod, a carriage wholly supported thereby and having a threaded portion, a lead screw, means for impelling the carriage to engage said lead-screw with its threaded portion, a telegraphone magnet, and yielding means having its tension entirely inde endent of the force of said first named yie dingmeans and impelling said magnet with respect to the carnage.

23. In a telegraphone, a continuously rotating steel disk, 8. pair of telegraphone magnets, a pivoted block or frame supporting said magnets in equal-bearing engagement against said disk, 'elding means for supporting said pivoted block or frame, and a carriage supporting said yieldin movable across the face of sairI means and disk.

24. In a telegraphone,, a carriage longitudinally movable and tiltable ona fixed axis, feeding means therefor, means for tilting said carriage on its axis .to disengage it from its feeding means, a telegraphone magnet, and

means pivoted in the carriage and yieldingly impelled with res ect thereto for supporting said recordin an reproducing magnet.

25. In a te egraphone, a continuously rotating steel'disk, a carriage movable over the face thereof, and apair of magnets, one of which is for erasing a record, both carried by I said carriage.

26. In a telegraphone, a continuously rotating steel disk, a carriage movable with re' tating steel disk, a carriage movable with re spect to the face thereof, and a pair of magnets supported by said carriage to bear egually and yieldingly against said disk, one 0 said magnets constituting an erasing means.

28. In a device of the class described, a continuousl rotating record medium, a carriage mova le over the face thereof, and a air of devices rigidly-connected together and both supported by said carriage to bear equally and yieldingtlxy against said medium during the rotation t ereof.

29. In a device of the class described, a continuously rotatin record medium, a car= riage movable over t e face thereof, a block or frame fulcru-med on said carriage, and a' pair of devices carried by said block or frame continuously rotating record medium, a carriage movable over the face thereof, a block or frame fulcrumed on said carriage, devices carried by said block or frame at equal dis tances on either side of said fulcrum and borne equally and yieldingly into engagement with said-medium thereby.

31. In a device of the class described, a continuously rotating disk, a carriage movable over the face thereof, a pair of devices rigidly connected together and supported by said carriage to bear against said disk, said carriage being guided to position said devices iczlo 1always track or trace a single path on the 32. In a device of the class described, a continuously rotating record medium having a perfectly smooth face, a carriage movable over said face thereof, and a pair of devices supported by said carriage to bear equally andyieldingly against said medium, one of said magnets being positioned to exactly trace or track the path of the other.

33. In a device of the class described, a continuously rotating steel disk having a smooth face, a carriage movable over said face, and telegraphone magnets sup orted by said carriage to bear against said medium during the rotation thereof, each of said magnets being positioned to trace or track the pathjof another.

34. In a device of the class described, a

continuously rotating record medium, a car ria e movable over the face thereof in a radia line of direction, and a pair of devices supported by said carria e to bear against said medium symmetrical y on either side of said radial direction line, whereby one of said devices exactly traces or tracks the path of the other at all times.

35. In a device of the class described, a continuously rotating record medium, a carria e movable over the face thereof in a radirection line, whereby one exactly tracks or traces the path of the other.

In witness whereof, I subscribe my signature, in the presence of two Witnesses.

HARVE R. STUART.

Witnesses:

WM. D. Cooxn, LoUIs WALTERS. 

